- 2 routers each connected via pppoe to an ADSL line.
- The (LAN) IP address on the first router is 192.168.0.1
- The (LAN) IP address of the second router is 192.168.0.2
- The routers are connected to each other via a cable to the LAN port.
(I can ping from one router to the other)

The first router does DHCP. The second router does not run DHCP.
The DHCP server in the first router assigns 50% of the clients to the second router by giving them the gateway and dns server address of the second router.

Both routers are remotely accessable because they run DDNS.
The first router is accessable via: router1.dnsservice.com:8081
The second router is accessable via: router2.dnsservice.com:8082

If the ADSL line of the first router goes down I would like to do the following:
access the webpage of the first router via the URL of the second router, but with a different port. Like this:
router2.dnsservice.com:8081

To achieve this I forwarded port 8081 on the second router to 192.168.0.1:80 (which is the HTTP port of the first router).
The LAN mac address of the second router is allowed to access the internet via the first router (the MAC address access "block all except" list on router 1).

It's not working. I can't access the first router via the URL of the second router.

Does anyone have an idea which configuration I should add on the second router to make it work?